VULNERABILITY INTELLIGENCE

CVE-2026-82259

CVSS score7.5 HIGH
EPSS probability0.53%
CISA KEVNot currently listed
Published2026-08-28
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

SvelteKit versions from 2.49.0 through 2.53.2 (fixed in 2.53.3) contain a deserialization expansion issue in the experimental form remote function. When an application enables experimental.remoteFunctions and uses the form function to process the files array without validating files.length or individual file sizes, an attacker can submit relatively small inputs that expand into very large file arrays, leading to expensive processing and denial of service.

Weakness classification

  • disclosure@vulncheck.com: CWE-502

Primary references